Some Materials Not Rendering, But They Are Applied
Some of your objects are duplicated.  In your .blend file, I selected one of the window shutters having problems showing materials.  I moved it away, and found there was still a shutter there.  One had material, and the other didn't.  Coinciding surfaces are unpredictable - you'll see parts of one and parts of the other mixed up, and exactly what you see  may change with camera position and viewpoint.

Solution is to find and delete those duplicate objects.